US Bridges

County Road 56 over Larimer County Canal

FairPosted for load

Larimer County, Colorado · 1.1 MI E of I-25 · Structure no. LR56-1.1-I25

Built
1940
85 years old, rebuilt 1970
Condition
Fair
inspected March 2025
Type
Tee Beam
Prestressed Concrete
Length
34 ft
1 main span
Daily traffic
221
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 56 over Larimer County Canal is a prestressed concrete tee beam carrying County Road 56 over Larimer County Canal in Larimer County, Colorado. It was built in 1940 and reconstructed in 1970, so it is 85 years old, older than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 221 vehicles a day, roughly 21% of them trucks, projected to reach 277 by 2043. The structure is 34 ft (10.5 m) long and 21 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCounty Road 56
CrossesLarimer County Canal
Location1.1 MI E of I-25
RouteCounty Highway 0
Coordinates40.65344, -104.98128
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2025
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating25 US tons
Inventory rating22.5 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadUnknown
Structure length34 ft (10.5 m)
Longest span28 ft (8.4 m)
Deck width21 ft (6.4 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic221 (2023)
Projected traffic277 by 2043
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 56 over Larimer County Canal built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1970.

What condition is County Road 56 over Larimer County Canal in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2025.

How much traffic does County Road 56 over Larimer County Canal carry?

About 221 vehicles per day (2023 count), of which roughly 21% are trucks.

How long is County Road 56 over Larimer County Canal?

The structure is 34 ft (10.5 m) long with a longest span of 28 ft (8.4 m) and a deck 21 ft wide.

Who owns County Road 56 over Larimer County Canal?

It is owned by the County Highway Agency.